Valgrind: Remove a few obsolete layout test suppressions.

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index b68e69e1546368ba19dd2542a77e53ec0f32e169..ba9476ec87bc375960d90ba5cc0099c00fb294a0 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -2412,19 +2412,6 @@
    fun:_ZN18chrome_browser_net27HttpServerPropertiesManager24UpdatePrefsFromCacheOnIOEv
 }
 {
-   bug_290407
-   Memcheck:Leak
-   fun:calloc
-   fun:_swrast_new_soft_renderbuffer
-   fun:_mesa_BindRenderbufferEXT
-   fun:shared_dispatch_stub_939
-   fun:_ZN3gfx9GLApiBase23glBindRenderbufferEXTFnEjj
-   fun:_ZN3gpu5gles216GLES2DecoderImpl18DoBindRenderbufferEjj
-   fun:_ZN3gpu5gles216GLES2DecoderImpl22HandleBindRenderbufferEjRKNS0_4cmds16BindRenderbufferE
-   fun:_ZN3gpu5gles216GLES2DecoderImpl9DoCommandEjjPKv
-   fun:_ZN3gpu13CommandParser14ProcessCommandEv
-}
-{
    bug_293024_b
    Memcheck:Leak
    fun:malloc
@@ -2541,17 +2528,6 @@
    fun:_ZN3net14URLFetcherCore15StartOnIOThreadEv
 }
 {
-   bug_332328
-   Memcheck:Leak
-   fun:malloc
-   fun:_ZN3WTF10fastMallocEm
-   fun:_ZN5blink14XMLHttpRequestnwEm
-   fun:_ZN5blink14XMLHttpRequest6createEPNS_16ExecutionContextEN3WTF10PassRefPtrINS_14SecurityOriginEEE
-   fun:_ZN5blink16V8XMLHttpRequest17constructorCustomERKN2v820FunctionCallbackInfoINS1_5ValueEEE
-   fun:_ZN5blink16V8XMLHttpRequest19constructorCallbackERKN2v820FunctionCallbackInfoINS1_5ValueEEE
-   fun:_ZN2v88internal25FunctionCallbackArguments4CallEPFvRKNS_20FunctionCallbackInfoINS_5ValueEEEE
-}
-{
    bug_332330
    Memcheck:Leak
    fun:malloc
@@ -2798,15 +2774,6 @@
    fun:_ZN7content27ServiceWorkerContextWrapper12InitInternalERKN4base8FilePathEPNS1_19SequencedTaskRunnerEPN5quota17QuotaManagerProxyE
 }
 {
-   bug_370206
-   Memcheck:Leak
-   fun:malloc
-   fun:_ZN3WTF16DefaultAllocator15backingAllocateEm
-   fun:_ZN3WTF16DefaultAllocator13backingMallocIPN7blink14InlineIteratorEvEET_m
-   ...
-   fun:_ZN3WTF17HashMapTranslatorINS_18HashMapValueTraitsINS_10HashTraitsIPN7blink7BidiRun*
-}
-{
   bug_371844
   Memcheck:Uninitialized
   fun:bcmp